[WCNCR00158507] misc: Fix emmc access from wifi driver

[Description]
Driver should not access emmc/sdcard file system for security concern.

Solution:
Change order to read /etc/firmware using request_firmware() API first.

Change-Id: Ia87f9630df8aeadf3e0b701ad3ec4cbfbc8e25cb
CR-Id: WCNCR00158507
Feature: misc
Signed-off-by: ZD Hu <zd.hu@mediatek.com>
(cherry picked from commit cd79b284609c9381441932595dbcb4c5bd1243c5)
2 files changed